The RGA Barbell Weight Calculator is developed to compare athletes of different size, gender and age in the squat, bench press, deadlift, overhead press and bench row. These exercises were selected for several reasons, but mainly because they’re a great combination for overall strength.
Performance standards (1) within competitive and amateur strength athletics show a relationship between strength, gender and body weight. We assembled the results to allow for an overview of this relationship.
The results were then compared to Wilks (2) where a lot of discrepancies were found. Wilks corresponds best with the equipped bench press, but for raw lifting the deviations are substantial when compared to actual powerlifting records. Due to this marked discrepancy, the RGA barbell weight curves could not use Wilks for more than a reference.
Secondly, Wilks doesn’t make any distinction between exercises. This is a damning flaw, since the relationship between strength development and body weight is not identical for all movements.
Thirdly, Wilks does not take into account, anatomical differences between male and female athletes. Gender has considerable influence on some movements.
After the RGA weight curves were individually defined for each exercise, formulas used for “one-rep max calculators” (e.g. Brzycki, Baechle etc.) were reviewed to get an idea of suitable RGA weight levels.
The below graphs shows how RGA’s barbell weights compare to powerlifting records, a linear growth factor and Wilks. Note that the powerlifting records are proportionally lowered to create a better overview.
(1) Powerlifting competitions etc.
(2) Wilks: Used to compare strength between athletes in powerlifting.
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